This waist trainer vest corset is equipped with smooth zipper closure and 2 Adjustable Trainer Belts, ensuring tummy control. Adjustable to make tighter or looser as needed. Shoulder straps can also prevent the vest shirt rolling up or down so that you can maintain a flat tummy. Vest tank top comes with 4 steel bones, providing strong support for your back, which aids in reducing back pain. The scientific design and compression of top rated waist cincher shape the tummy & define your waistline, flatten abdomen, tighten body fat, maximize to achieve an hourglass figure, then achieve and maintain a good posture. Our waist trainer is designed to flatten tummy with moderate control, which makes your abdomen become slim and tight.